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SELF AND BRADFORD S'IETSONQOF' SAM-E PLAGE.

Letters Patent No. 77,742, `dated May 1 2, 1868.

IMPROVEMENT IN TOOL-POST FOR LAfIHB 0R PLANINGfMIAGHINES.

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Be it known that I, WILL-IAM H. LEACH, of Uxbridge, in the county ofWorcester, and State of Massachusetts, have invented n new andirnprovedTool-Post for Lathes, Flaming-Machines, &c., of which the followinglisaffull, clear, und exact description, reference being had to theaccompanying drawings, making a.4 part of this speciication, in whicbFigure 1 represents n. vertical'seetion of n tool-post embodying myinvention.

Figure 2 is a perspective view of the same on a reduced scale. y

The object of invention is toA construct a. tool-post for lathes,planing-machines, die., in -Such a. manner as to enable the point of thecutting-tool tohe readily adj usted in any desired position relativelyto the material to be operatednpou'; and the invention consists inattaching the tool-postte the base-plate by means of n. balland-socketjoint, in combination with a collnr, fitting upon the outer surface nfthe socket portion, thus forming a double bearing. Upon the colla-r 4issupportedthe cutting-tool, wbichpasses through a. slot in the upperportion ofthe post, and is held in position by means of a .screw passingthrough the top of theA post in the usual manner.

Referring to the drawings, A represents the baise-plate, provided with ohole, a, for tho reception of a holt,

by which it is secured to the frame of the machine. -At one end of thebcse-plaitc is a hemispherical casing or socket, A', provided with auopening at the top. i Within this socket is tted Ithe lower portionot`the tool-post, forming a. half ball-socket joint. On the outer upperportion of' the socket A is supported the collar C,` its'contact surfacebeing curved to correspond with the curvedA surface of the said socket.Thepp'ortion A. serves thc' double purpose of a. ball' and socklet,constituting n socket to the portion B' ot" the tool-post, und as a.ball to the collar-'0, the latter being then the socket, thus forming adouble or compound ball-und-'sockct joint.

D is the cutting-tool, which passes through n slot inthe tool-post, andrests upon the upper surface of the collar C. Fis the screw, whichpasses down through the upper portion ot the tool-post,-a;ndbearing uponthe cutting-tool, secures all the parts in position.

It will thus be seen that the tool-post B may be turned and inclined inany direction, so 'as tu adapt the -point of fthe cutting-tool to anyposition that may bo required, by simply loosening the 'screw F; andupon `tightening the screw, it will be firmly held in position. g.

It will be obscrvedthatthe tool-post is-held by'a, double frictionalbearing, thcnction ofthe screw serving to dr'aw the portion B againstthe'inner side of the sock-et A, and at the same time pressingthe/collar C upon the outer'surface of the socket, which holds the postfirmly in any desired position against nnyforce that may bee'xertedupon. the cutting-tool. Y

The device is applicable to ironzmd wood-turninglathes, iron-planers,und 'shapingmachines Having thus described my invention, what I claim asnew, and desire to secure by Letters Patent, is

The construction of a. tool-post, i'or a lathe or other machine, 'withthejoint AB, in combination with the collar C and set-screw F,substantially as and for the purpose set forth.

" In testimony whereof, I have signed my name to this specification inthe presence of two Asubscribing witnesses.

' i WM. H. LEACH.

Witnesses:

GEO. `W. HoBBs, BRADFORD -S'rnTsoN.

